Fangrui Product Details 1. B7 Bluetooth Earphone Smart Bracelet, Support Sleep Monitoring Blood Oxygen Monitoring Heart Rate Monitoring 2. Bluetooth Version: 5.0 3. Talk Time: About 6-8 Hours 4. Standby Time: About 3-4 Days 5. Battery Capacity: Built-in 90mah 6. Charging Method: Type-c Input 7. Charging Time: About 1-2 Hours 8. Waterproof Level: Life Waterproof 9. Hidden Earphone Design, Pick Up To Answer And Put In To Hang Up 10. Blood Pressure And Oxygen Monitoring Anytime, Anywhere, To Accurately Grasp Your Health Status 11. The Callers Name And Number Are Clear At A Glance, So You Dont Miss Important Calls 12. New Large Led Touch Screen, High-definition Display 13. A Variety Of Personalized Dials To Enrich Your Choices 14. Raise Your Hand And Turn Your Wrist To Turn On The Screen Immediately, Smart And Convenient 15. Accurately Record Various Sports Data, Exercise Steps, Etc. 16. New Heart Rate Detection, Touch To The Heart Rate Interface 17. Automatic Sleep Monitoring At Night, Clearly Understand The Time Of Deep Sleep And Light Sleep 18. Magnetic Suction + Buckle Design, Easy To Take And Double Anti-lost 19. Support Single-touch, Type-c Charging, Caller Name Display, Bluetooth Headset To Pick Up The Headset To Answer, Put Down The Headset To Hang Up, A Variety Of Dials, Sports Information Sleep Monitoring, Heart Rate, Blood Pressure, Blood Oxygen, Stopwatch, Alarm Clock, And More Various Sports Modes, Raise Your Hand To Brighten The Screen And Other Functions.